Will not be doing either immediately but hopefully in the next few months. Tank is established 125 gallon mixed reef. I'm really torn between the two. My reason for either would primarily for nutrient control. IF i do a refugium it will be a seperate tank plumbed into and sharing the sump of my tank. The refugium would likely cost a lot more, but once up would require little to no maintenance other then occasionally sticking my hand in and pulling out chaeto or whatever I was growing. Pax bellum would be a lot cheaper, but would require monthly maintenance. Help me decide reefing community. what are the benefits to both? Downsides? am I missing something?